<i>Submission file:</i> short.(java, cs, c, cpp)<br />
<i>input:</i>Console, stdin, System.in<br />
<i>output:</i>Console, stdout, System.out<br />
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<b>Introduction</b><br />
Problem introduction goes here.
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<b>Input</b><br />
Description of the input file contents goes here.
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<b>Expected output</b><br />
Description of the sample output goes here.
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<b><i>Example Input</i></b><br />
<pre>3
10 10 10 10 10 10 10
10 20 30 40 50 60 70 80 90 100
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
</pre>
<b><i>Example Output</i></b><br />
<pre>10.00
55.00
10.00
</pre>